Forging machine



FORGING MACHINE- Fil ed Dec. '20, 1940 4 Sheets-Sheet l INVENTOR Feb;17, 1942 L, M, BROWN 2,273,175

FORGING MACHINE Filed Dec. 20, 1940 4 Sheets-Sheet 2 Feb. 17, 1942. L.M. BROWN FORGING MACHINE Filed Dec. 20, 1940 4 Sheets-Sheet I5 INVENTORFeb. 17, 1942. L. M. BROWN FORGING MACHINE Filed Dec. 20, 1940 4Sheets-Sheet 4 INVENTOR i 4 g 7%. fimm Patented Feb. 17, 1942 UNITEDSTATES FAT T OFFICE FonciNG MACHINE Linwood M. Brown, Pittsburgh, Pa.,assigncr to L. M. Brown, Inc., a corporation of Delaware 6 Claims.

This invention relates to forging machinery,

and consists in means for transferring blanks one omy in operation. Theinvention has been developed in application to a machine for forgingbits for coal-mining machines, and in such application it will here beshown and described.

In the accompanying drawings Fig. I is a view in which one of the diesof a forging machinethe anvil die-is fragmentarily shown in verticalsection, and, associated with it, the blank-transferring and theblank-supporting means are shown in side elevation. In Fig, I themovable parts are shown in position for the initial receptioncf a blankto be forged. Figs. II and III are similar views of the same assembly,but showing the blank-transferring and blank-supporting means insuccessive positions in the course of operation. Fig. IV is afragmentary view in vertical and longitudinal section of a portion ofthe blank-transferring means when in the position shown in Fig. I. Inthis figure the blank carrier is particularly shown. Fig. V is a view invertical and transverse section, on the plane indicated by the arrowsV-V, Fig. III. Fig. VI is a view in plan of the blank carrier that inFigs. IV and V is shown in section. Figs. VII and VIII are views of thecarrier in end elevation and in vertical and transverse section, asindicated by the arrows VII-VII and VIII-VIII, Fig. VI, respectively.And in Figs. VII and VIII a blank support is diagrammaitcally indicatedin successive positions of co-operation.

The Work-carrying and work-sustaining parts, in which invention isfound, are parts of an organized machine that includes a chute I throughwhich heated blanks are fed one by one-in this case by gravityand a die2, upon the faces of which the blank is forged and its tip is brought toultimate shape, completing the bit. In Fig, I a blank B is shown indotted lines, in position in a carrier 3, and it will be understood thatthe blank, descending through chute I, has been re-- ceived by theunderlying carrier 3 and arrested within the carrier, in the positionshown. In Fig. III a finished bit C is shown, its forged tip restingupon the surfaces of the die 2.

The invention includes the carrier 3, which slides in horizontal courseupon the face of a plate 4, and between guide rails 5 and 6. Upon theface of rail 5 is secured the overhanging plate 7. The carrier 3 movesin slideway so defined between two extreme positions: one, theblank-receiving position beneath chute I, shown in Fig. I; the other,the blank-delivering position beneath die 2, shown in Fig. III. At theblank-receiving end of its range (the right-hand end, Figs. I and IV) astop-block 50, rigidly mounted upon plate l, arrests the carrier in itsleft-to-right traverse. A block of wood has been found suitably toafford a stop of the desired degree of elasticity.

The carrier 3 (of. Figs. I, I I-VIII) is of boxlike form, open above,and consists of two castings 8 and i) and two plates it and I l. Thecasting 8 forms the outer side wall of the carrier and also the endwall, at the end (Fig. I) remote from the die 2; the castings forms theinner side wall, and the two castings are bolted together. The face ofcasting 8 is stepped to be securely engaged by rail 5 with itsoverhanging plate 7 (cf. Fig. V), and casting .l is shaped to restfirmly upon rail 6 (as also seen in Fig. V). The casting 3 carries astud l2, provided primarily for engagement by the carrier-shiftingmeans, and upon this stud the two plates It and "H are strung (suitableholes being formed in the plates). Plate if! is bent and shaped, as bestseen in Figs. VII and VIII, to lie flat against the outer face ofcasting 8, to underly and to form the floor of the carrier, and toextend in an obliquely directed end it, for purposes presently to bedescribed. Plate H is bent and shaped, as best seen in Figs. VI andVIII, to lie fiat against the outer face of casting 8 (plate If),however, lying interposed between) and to form the end wall of thecarrier, at the end (Fig. I) adjacent to die 2. The stud l2 carries aproperly backed spring Hi. The spring bears compressively upon the outerface of plate H, and is effective normally to hold plates If) and I!snug upon the outer face of casting 3, and when the plates are so held,plate it! affords a closed bottom for carrier 3 and plate H a closed endwall. From such positions the plates may be shifted, against the tensionof spring 14.

Within the carrier a block it is pivotally mounted. A stop it limits itsturning in clockwise direction (Fig. IV) and a light spring I! tends toturn it in clockwise direction. This block is so shaped and arranged,and its driving spring is of such limited strength that when a blank Bdescending by gravity from chute l strikes the block the block yieldsslightly, in counter-clockwise turning, and at the same time guides theblank to secure position, resting upon the bottom wall it! and againstthe end Wall of the carrier, and in such position (the positionindicated in Fig. IV) the blank is by the springbacked block secured.

A lever E8 of the third class, bifurcated at its outer end, is fulcrumedon a shaft I!) that is mounted in rigid bearings. This lever, by itsbifurcated end, engages a roller 2!) idly mounted upon the stud l2, andby such engagement the lever in its swinging effects the shifting of thecarrier 3 between its blank-receiving and blankdelivering positions. Ashaft 22, mounted in rigid bearings, carries arms 2| and 23 and providesa manually operable lever of the first class. Its work arm 23 isequipped with a roller 24. The lever [18 carries integrally an arm 25upon the face of which, as shown in Figs. I and II, the roller 24 makesengagement. As the lever 2|, 23 is swung clockwise, from the positionshown in Fig. I to that shown in Fig. II, the lever i8 is driven, by thebearing of roller 24 upon the face of arm 25, in counter-clockwiseturning, and the carrier 3 is shifted from the blank-receiving position(Fig. I) toward the blank-delivering position (Fig. III). The arm 25 isformed as a separate member, mounted on a pin I86 carried by lever i8,and a bolt-and-slot engagement 26 is provided, by which the arm whenswung to proper angularity with relation to the lever It may beintegrated with the lever, and by such means the range of theright-to-left traverse of the carrier 3 may be accurately adjusted.

The lever H2 is provided with an integral arm 21, and a tension spring28, anchored to the arm 21, is at its opposite end anchored to therollerequipped lever arm 23. The lever l8, in that it is provided withthe arm 27, becomes, under the tension of spring 23, a lever of thefirst class. The tension of the spring 28 is effective to shift thecarrier to abutment upon block E! and to blank-receiving position (Fig.I) when lever I8 is free to turn under that influence.

A work-support in the form of a lever 30 is fulcrumed in a block 3| thatmoves in a runway formed by and between two rigidly mounted bars 32 and33. A spring-backed pivoted bar 34, en-

gaging the lever 33, tends always to cause the lever to turncounter-clockwise (Figs. IIII) on its fulcrum; and in the range ofoperation such turning is opposed, first by the bearing of the lower armof the lever upon the face of a stationary guide-block 35, and afterwardby the bearing of the upper arm of the lever upon the face of aguide-block 36 (cf. Figs. III and V). The lever 33 that forms thework-support, the bars 32 and 3t, and the guide-blocks 35 and 36 are soshaped and proportioned that, as the fulcrum block 3| is shifted upwardfrom the position shown in Figs. I and II to that shown in Fig. III, thework-support rises from inactive to active position. In its rise thework-support 30 engages the obliquely disposed end |3 of plate It] (Fig.VII) and shifts plates Ill and H aside (against the tension of springHi). Continuing to rise, the work-support til engages the blank B withinthe carrier (Fig. VIII) and brings it to position adjacent the die 2(Fig. III).

Such rise of the work-carrier 3i) is effected by an arm 3? extendingfrom shaft 22 and engaging the fulcrum block 3| by its bifurcated end,as seen in Figs. II and III. There is splined connection between theshaft 22 and the hub 29 of the arm 31, but the spline-receiving recessin one of the members (conveniently in the hub, as the drawingsindicate) affords free turning of the shaft within the hub through alimited range (approximately as here shown). The parts are so arrangedthat, in the swinging of lever 2 23 to effect transverse of the carrier3 from blankreceiving position (Fig. I) toward blank-delivering position(Fig. II) the shaft turns freely within the hub 29 of the still unmovedarm 31. In this initial swing the lost motion is taken up; and as thecarrier approaches the left-hand limit of its range the continuing shiftof the lever causes arm 31 to swing. The lever 2|23 continues to swing,until it brings arm 31 to the position shown in Fig. III. In this swingof arm 31 the work-support 36 is raised from inactive to activeposition.

The parts are so proportioned that as lever 2| is swung the risingwork-support engages the oblique end l3 of plate It before the roller 24passes beyond the upper end of plate 25. The plate 25 is so adjustedwith relation to lever l8 that, at that point in the operation, thecarrier 3 has come precisely to work-delivering position. When in thecontinued swing of lever 2| roller 24 passes beyond the upper end ofplate 25 the spring 28 is effective to swing lever |8 clockwise, and tobring carrier 3 again to its initial blankreceiving position (Fig. III).Such return of the carrier is unimpeded, because the end wall of thecarrier, formed by the plane I, has been shifted, and the carrier is, atthe time, open-ended. When, however, the carrier on its return movementis free of engagement with the work-support Bil, the spring I4 iseffective to bring again to closing positions the bottom wall and theend wall of the carrier.

When the forging operation is completed, the lever is shifted again,counter-clockwise from the position shown in Fig. III to that shown inFig.1, and the return movements of the operative parts are effected, inreverse order. As the work-support descends, the finished bit slips fromits position upon die 2, and topples from the support to a receptacleprovided to receive it.

Provision is made for allowing the roller 24, in the return movement oflever 2|, to pass to one side of plate 25. Such provision is found in ahinging of the arm 23 at an intermediate point in its extent, asindicated at 3B, and in forming upon plate 25 an extension 39 with asurface so disposed that the distal end of lever 23, abutting upon thissurface is swung aside. When the arm 23 in its counter-clockwise swinghas so passed the plate 25, the spring 28, because of its obliqueposition (cf. Fig. V) is effective to swing the distal end of the armback again, with the roller 24 again opposed to the face of plate 25.

C'o-operating with the parts described, and particularly with thework-support 30, means are provided for sustaining the blank yieldinglyin position, spaced slightly from the face of the anvil die 2, to meetthe repetitive blows of the hammer die (not shown). These means arefound in a lever with a resilient arm 40 that is swung against springtension from the full-line to the dottedline position, Fig. V, by thedownward shift of a wedge plate 4| upon which the lever at its lower endrests. The plate 4! is shifted in response to the turning of a shaft 42,and the shaft is turned in one direction by a treadle 43, and inopposite direction by a spring 44. The work-engaging position of lever49 is nicely determined by means of the adjusting screw 45 through whichthe lever engages the wedge plate.

In operation, the attendant swings the lever 2| clockwise. Suchclockwise swing of lever 2| first causes carrier 3 (which, as may beunderstood, contains a bit blank, as seen in Fig. I) to advance fromright to left; then, as the carrier approaches the limit of its range ofadvance, the continued swinging of lever 2| causes work-support 30 torise. As the carrier comes to the limit of its advance the risingwork-support forces aside the bottom plate and the end wall of thecarrier, and receives upon its properly shaped upper end the bit blank.When this has occurred the carrier returns under spring tension to itsinitial position. Meanwhile the work carrier continuing to rise bringsthe work to place adjacent the surface of die 2. The attendant at thesame time presses treadle 43 and causes lever 40 to swing to engagementwith the rising blank and yieldingly to sustain it accurately in place.Forging follows.

When the forging operation is completed the attendant, having releasedthe treadle, and so allowed spring 44 to shift the wedge block 4| upwardand the spring-backed lever 40 to resume inactive position, swings thelever 2| again in reverse course to initial position. In this returnswing the lost motion between hub 24 and shaft 22 is first taken up, andthen the work support 30 is returned to initial position, and the arm23, by virtue of the ability of its hinged distal end to be swung asideagainst spring tension returned to its initial position with the roller24 in proper position for engagement with plate 25, on renewal ofoperation.

I claim as my invention:

1. In a forging machine the combination with a die, of a guideway, ablank-carrier reciprocable along said guideway between receiving anddelivering positions, means for positively driving said carrier alongsaid guideway through a predetermined course, a spring tending to shiftthe so driven carrier in reverse direction, means for releasing thecarrier from said positive driving means at the end of such course tothe action of said spring, and a movable work support adapted to engagea blank within the carrier when the carrier in response to said positivedriving means has come to the end of its course, and to bring the blankto position with relation to the die.

2. The structure of claim in which said positive driving means includetwo relatively movable members, said spring being connected between saidmembers, whereby the positive driving means in their carrier-drivingoperation augment the tension of the said spring.

3. In a forging machine the combination with a die, of a guideway, ablank-carrier reciprocable along saidguideway, and means forreciprocating said carrier along said guideway from a remote position toan advanced position beneath said die, the carrier being provided with abottom wall movable from blank-retaining position to blank-releasingposition, a work-support reciprocable vertically beneath said die and inits rise having a portion adapted to engage and move the bottom wall ofthe said carrier to blankreleasing position when the carrier is in itsadvanced position, to receive a blank within the carrier, and to bringthe blank to forging position with relation to the die.

4. In a forging machine the combination with a die, of a guide-way, ablank-carrier reciprocable along said guideway, and means forreciprocating said carrier along said guideway from remote position toan advanced position beneath said die, the carrier being provided with abottom wall and an end wall both movable from blank-retaining positionsto blank-releasing positions, a work-support reciprocable verticallybeneath said die and having a portion adapted,

when the carrier is in its advanced position and the work-support rises,to engage and shift to blank-releasing positions both the bottom walland the movable end wall of the carrier and to raise a blank from withinthe carrier to forging position with relation to the die.

5. In a forging machine the combination with a die of a guideway, ablank-carrier reciprocable along said guideway between receiving anddelivering positions, said carrier being provided with a bottom wall andan end wall both movable from blank-retaining positions toblankreleasing positions, means for positively driving said carrieralong the guideway from a remote position to an advanced positionbeneath said die, a spring tending to shift the so driven carrier inreverse direction, means for releasing said carrier from said positivedriving means when the carrier has come to advanced position, and awork-support reciprocable vertically beneath said die and having aportion adapted, when the carrier is in its advanced position and theworksupport rises, to engage and shift to blank-releasing positions boththe bottom wall and the movable end wall of the carrier, and to raise a,blank from within the carrier to forging position with relation to thedie.

6. A forging machine including a forging die, a carrier movable fromblank-receiving position to blank-delivering position, said carrierincluding a blank-supporting portion yieldingly secured to the carrierbody, said portion being movable from blank-supporting position toblank-releasing position, means for shifting said carrier fromblank-releasing position to blank-delivering position, a member movablerelatively to said carrier in blank-delivering position, said memberincluding a portion that in its movement engages the blank-supportingportion of said carrier, to shift it from blank-supporting position toblank-releasing position, said member being adapted to shift thereleased blank from the carrier to forging position on said die.

LINWOOD M. BROWN.

